GB784609A - Improvements in or relating to processes for reducing acidity of nitric acid solutions containing metal salts - Google Patents

Improvements in or relating to processes for reducing acidity of nitric acid solutions containing metal salts

Info

Publication number
GB784609A
GB784609A GB3191853A GB3191853A GB784609A GB 784609 A GB784609 A GB 784609A GB 3191853 A GB3191853 A GB 3191853A GB 3191853 A GB3191853 A GB 3191853A GB 784609 A GB784609 A GB 784609A
Authority
GB
United Kingdom
Prior art keywords
nitric acid
solution
metal salts
aqueous solution
formaldehyde
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3191853A
Inventor
Thomas Victor Healy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Priority to GB3191853A priority Critical patent/GB784609A/en
Priority to US469354A priority patent/US2835555A/en
Publication of GB784609A publication Critical patent/GB784609A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/04—Treating liquids
    • G21F9/06—Processing
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
    • C01B21/38—Nitric acid
    • C01B21/46—Purification; Separation ; Stabilisation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Inorganic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

<PICT:0784609/III/1> In concentrating aqueous nitric acid solutions of chemical substances, e.g. fission products, to reduce acidity, the heated aqueous solution of metal salts containing nitric acid at not exceeding 8N is reduced with formaldehyde, and the nitric oxide formed is passed in contact with further aqueous solution of the metal salts containing nitric acid at above 8N to decompose further acid and reduce acidity to not exceeding 8N. Formaldehyde as gas or aqueous solution may be used. The solution, containing fission producs, 8N nitric acid, and added electrolytes resulting from dissolving neutron-irradiated uranium in nitric acid and separating the majority of the uranium and plutonium, is introduced through pipe 6 into stainless steel boiler 1. The solution is heated by electric heater 2 while 35-40 per cent formaldehyde solution is added through 8. The nitric oxide formed, passes up ceramic packed column 3 countercurrent to further aqueous solution, 15N in nitric acid, introduced through spray 7 so that nitric acid is decomposed to nitrogen dioxide. The solution withdrawn through 10, 0.25N in nitric acid may be concentrated to 15N and returned to the system if desired.
GB3191853A 1953-11-17 1953-11-17 Improvements in or relating to processes for reducing acidity of nitric acid solutions containing metal salts Expired GB784609A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3191853A GB784609A (en) 1953-11-17 1953-11-17 Improvements in or relating to processes for reducing acidity of nitric acid solutions containing metal salts
US469354A US2835555A (en) 1953-11-17 1954-11-17 Reduction of acidity of nitric acid solutions by use of formaldehyde

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3191853A GB784609A (en) 1953-11-17 1953-11-17 Improvements in or relating to processes for reducing acidity of nitric acid solutions containing metal salts

Publications (1)

Publication Number Publication Date
GB784609A true GB784609A (en) 1957-10-09

Family

ID=10330331

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3191853A Expired GB784609A (en) 1953-11-17 1953-11-17 Improvements in or relating to processes for reducing acidity of nitric acid solutions containing metal salts

Country Status (1)

Country Link
GB (1) GB784609A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115057418A (en) * 2022-06-24 2022-09-16 中国原子能科学研究院 Method and device for producing nitrogen dioxide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115057418A (en) * 2022-06-24 2022-09-16 中国原子能科学研究院 Method and device for producing nitrogen dioxide

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